# How to factor #2x^2+x-1# ?

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i tried to factor it and i got #(2x+1)(x-1)#

but my friend said the correct answer is #(2x-1)(x+1)#

i tried to factor it and i got

but my friend said the correct answer is

##### 1 Answer

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Jokekok
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Mar 9, 2018

#### Answer:

It is (2x-1)(x+1), you're friend is right.

#### Explanation:

If you multiply it back out, you should get the original equation. Your answer (2x+1)(x-1) is equal to 2x^2-x-1. That does not equal the original one.

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